BR112017021087A2 - An operating method of an upper bottom blowing converter - Google Patents

An operating method of an upper bottom blowing converter

Info

Publication number
BR112017021087A2
BR112017021087A2 BR112017021087-8A BR112017021087A BR112017021087A2 BR 112017021087 A2 BR112017021087 A2 BR 112017021087A2 BR 112017021087 A BR112017021087 A BR 112017021087A BR 112017021087 A2 BR112017021087 A2 BR 112017021087A2
Authority
BR
Brazil
Prior art keywords
converter
blowing
blow
nozzles
molten iron
Prior art date
Application number
BR112017021087-8A
Other languages
Japanese (ja)
Portuguese (pt)
Other versions
BR112017021087B1 (en
Inventor
Takahashi Yukio
Amano Shota
Tawa Toshinori
Uchida Yuichi
Miki Yuji
Original Assignee
Jfe Steel Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jfe Steel Corporation filed Critical Jfe Steel Corporation
Publication of BR112017021087A2 publication Critical patent/BR112017021087A2/en
Publication of BR112017021087B1 publication Critical patent/BR112017021087B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/30—Regulating or controlling the blowing
    • C21C5/35—Blowing from above and through the bath
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/4606—Lances or injectors
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
    • C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
    • C21C5/28—Manufacture of steel in the converter
    • C21C5/42—Constructional features of converters
    • C21C5/46—Details or accessories
    • C21C5/48—Bottoms or tuyéres of converters

Abstract

[tarefa] é fornecer um método de operação de um conversor de sopro superior e inferior que é capaz de suprimir a oscilação de um conversor e geração de poeira e também suprimir o desgaste do refratário de parede de forno em um refino por descarbonetação com um conversor de sopro superior e inferior. [solução] um método de operação de um conversor de sopro superior e inferior pela utilização de uma lança de múltiplos furos de sopro superior possuindo uma pluralidade de bocais de lança para lançar gás de oxigênio, lançando jatos de oxigênio a partir dos bocais em um ângulo de inclinação de bocal inclinado com relação a um eixo geométrico central da lança de múltiplos furos de sopro superior, dispondo n algaravizes de sopro inferior em um fundo do conversor e assoprando um gás de agitação a partir dos algaravizes de sopro inferior, onde uma taxa de interferência (ir) ilustrando um grau em evolução entre um ponto quente formado atingindo-se o jato de oxigênio lançado a partir da lança de múltiplos furos de sopro superior para uma superfície de banho de ferro derretido e uma região flutuante de gás de agitação formada em uma superfície de banho de ferro derretido pelo sopro e flutuação do gás de agitação a partir dos algaravizes de sopro inferior no ferro derretido não é maior do que 0,7.[task] is to provide a method of operating an upper and lower blowing converter that is capable of suppressing the oscillation of a converter and generating dust and also suppressing the wear of the furnace wall refractory in a decarburization refiner with a converter upper and lower blowing. [solution] a method of operating an upper and lower blowing converter by using a multiple-hole upper blow lance having a plurality of lance nozzles to release oxygen gas, launching jets of oxygen from the nozzles at an angle inclined nozzle inclination with respect to a central geometric axis of the upper blow multiple-hole boom, with n lower blow nozzles at the bottom of the converter and blowing a stirring gas from the lower blow nozzles, where a rate of interference (ir) illustrating a degree of evolution between a hot spot formed reaching the jet of oxygen launched from the upper multiple-blow boom to a molten iron bath surface and a floating agitation gas region formed in a bath surface of molten iron by blowing and fluctuation of the stirring gas from the lower blowing algarves in the molten iron is not greater than 0 , 7.

BR112017021087-8A 2015-03-30 2016-03-25 TOP AND BOTTOM BLOW CONVERTER OPERATING METHOD BR112017021087B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2015068542 2015-03-30
JP2015-068542 2015-03-30
PCT/JP2016/059541 WO2016158714A1 (en) 2015-03-30 2016-03-25 Method for operating top-blown converter

Publications (2)

Publication Number Publication Date
BR112017021087A2 true BR112017021087A2 (en) 2018-07-03
BR112017021087B1 BR112017021087B1 (en) 2021-08-31

Family

ID=57004303

Family Applications (1)

Application Number Title Priority Date Filing Date
BR112017021087-8A BR112017021087B1 (en) 2015-03-30 2016-03-25 TOP AND BOTTOM BLOW CONVERTER OPERATING METHOD

Country Status (7)

Country Link
EP (1) EP3279340B1 (en)
JP (1) JP6358454B2 (en)
KR (1) KR102026765B1 (en)
CN (1) CN107429303B (en)
BR (1) BR112017021087B1 (en)
TW (1) TWI585208B (en)
WO (1) WO2016158714A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020203471A1 (en) * 2019-04-05 2020-10-08 Ｊｆｅスチール株式会社 Refining vessel for high temperature melt
CN113234884A (en) * 2021-04-23 2021-08-10 甘肃酒钢集团宏兴钢铁股份有限公司 Method for solving interference between positions of top-blown gas and bottom-blown lance of converter
CN115466814B (en) * 2022-08-30 2023-09-15 北京科技大学 Converter and method for improving dynamic characteristics of molten pool

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5757816A (en) * 1980-09-19 1982-04-07 Kawasaki Steel Corp Steel making method by composite top and bottom blown converter
JPS5816013A (en) 1981-07-17 1983-01-29 Kawasaki Steel Corp Operating method for top and bottom blown converter and top blowing lance for operation of top and bottom blown converter
JPS60165313A (en) 1984-02-07 1985-08-28 Nippon Steel Corp Top blow lance for refining molten metal
JP3167888B2 (en) * 1995-07-27 2001-05-21 川崎製鉄株式会社 Decarburization refining method of chromium-containing molten steel and upper blowing lance for refining gas
JP3580177B2 (en) * 1999-04-23 2004-10-20 住友金属工業株式会社 Decarburization refining method for Cr-containing molten steel
JP4120161B2 (en) * 2000-01-24 2008-07-16 Ｊｆｅスチール株式会社 Operation method of iron bath smelting reduction furnace
JP2002105525A (en) * 2000-09-26 2002-04-10 Kawasaki Steel Corp Top-blown converter
JP2002285224A (en) 2001-03-23 2002-10-03 Nippon Steel Corp Blowing method into converter and blowing lance for converter
DE102004016681A1 (en) * 2004-04-05 2005-12-22 Ispat Industries Ltd., Taluka-Pen Processes and equipment for producing and increasing the annual production volume of bulk steel or high grade steel grades in a two-vessel plant
JP5724761B2 (en) * 2011-08-31 2015-05-27 Ｊｆｅスチール株式会社 Converter blowing method
EP2752497B1 (en) * 2011-10-17 2018-08-22 JFE Steel Corporation Powder injection lance and method of refining molten iron using said powder injection lance
JP5553179B2 (en) * 2012-01-12 2014-07-16 新日鐵住金株式会社 Reduction method of spitting in converter decarburization refining.

Also Published As

Publication number Publication date
CN107429303B (en) 2019-12-31
EP3279340B1 (en) 2020-11-18
EP3279340A4 (en) 2018-02-07
JPWO2016158714A1 (en) 2017-05-25
WO2016158714A1 (en) 2016-10-06
TW201641696A (en) 2016-12-01
BR112017021087B1 (en) 2021-08-31
JP6358454B2 (en) 2018-07-18
TWI585208B (en) 2017-06-01
KR20170117168A (en) 2017-10-20
KR102026765B1 (en) 2019-09-30
CN107429303A (en) 2017-12-01
EP3279340A1 (en) 2018-02-07

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Legal Events

Date Code Title Description
B06U Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 25/03/2016, OBSERVADAS AS CONDICOES LEGAIS.